Problem solving with permutations and combinations: check 1
Difficulty: ★★☆Info
Maths4U Original · Short practice
There are 6 distinct labelled tokens, including A and B. Consider each selection or arrangement separately.
How many unordered groups of three tokens can be chosen?
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Problem solving with permutations and combinations: review variant 1
Difficulty: ★★☆Info
Maths4U Original · Short practice
There are 7 distinct labelled tokens, including A and B. Consider each selection or arrangement separately.
How many unordered groups of three tokens can be chosen?
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Problem solving with permutations and combinations: check 2
Difficulty: ★★☆Info
Maths4U Original · Short practice
There are 7 distinct labelled tokens, including A and B. Consider each selection or arrangement separately.
How many ordered rows of three distinct tokens can be formed?
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Problem solving with permutations and combinations: review variant 2
Difficulty: ★★☆Info
Maths4U Original · Short practice
There are 8 distinct labelled tokens, including A and B. Consider each selection or arrangement separately.
How many ordered rows of three distinct tokens can be formed?
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Problem solving with permutations and combinations: check 3
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 17 red and 4 blue counters. Two are selected uniformly, one after the other, without replacement.
Given that the second counter is red, find the probability that the first was red.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Problem solving with permutations and combinations: review variant 3
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 18 red and 5 blue counters. Two are selected uniformly, one after the other, without replacement.
Given that the second counter is red, find the probability that the first was red.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Problem solving with permutations and combinations: check 4
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 18 red and 5 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability that both are blue.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.
Problem solving with permutations and combinations: review variant 4
Difficulty: ★★☆Info
Maths4U Original · Short practice
A container has 19 red and 6 blue counters. Two are selected uniformly, one after the other, without replacement.
Find the probability that both are blue.
Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.